PWM frequency problem between MOSFET and Driver

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Yin Min

Joined Jun 24, 2019
11
Hi,

Now, I am facing some issues with PWM frequency. I generated one frequency program with C. Frequency is time varied frequency( Hz to KHz) using adjustable PWM. My problem is that when I adjust PWM minimum and the load current is high (>2.77 A), MOSFET is not working properly. When I check with oscilloscope, not getting Frequency continuously. When I check with LED, LED is blinking. Then when I check with another time varied frequency without adjustable PWM, it is OK and can get high current (>5A). Is there any solution, please??

Thanks for your help,
Yin Min
 

Sensacell

Joined Jun 19, 2012
2,450
Your post is very confusing.

You speak of frequency and PWM- two very different ideas?

What is the purpose of the circuit?
 
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